Fluorescer
荧光剂; 荧光增白剂
🗣️ 情景例句
Are you being waited on?
您需要服务吗？
I may be wrong, but your theory is all wrong, professor.
也许我不对，不过，教授您的理论是完全错了。
of a change of atmosphere, of a diversion of effort, is essential.
改变一下气氛，转移一下注意力，这是不可缺少的。